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Re: GTOCP4 Caps

M Hambrick
 

Hi Ken

The RM15TR-C(71) caps are the ones that will fit the larger diameter threaded connectors on the GTOCP4 that the Y-cable and Encoder cable attach to. I checked the website and the internal thread specifications for the RM15TR-C(71) and RM15TR-C(31) are different (see below). 

Be VERY careful if you try to screw the RM15TR-C(31) caps onto your GTOCP4 that you do not strip out the threads of the connectors. If they do not thread on very easily, don't try to force them. In fact, based on the drawings below I don't think I would try them at all. I measured the threads on my GTOCP4 and verified that they are M20 X 2 threads.

It is interesting that Mouser told you they are out of stock of the RM15TR-C(71) caps. I ordered three of them yesterday and they don't show to be backordered. I am on the Mouser web site now, and they are showing that they have 26 of the RM15TR-C(71) caps in stock. You can also try searching using the Mouser number 798-RM15TRDC71.

Mike

Here is the RM15TR-C(71) It has M20 X 2 internal threads. This is the correct cap for the connectors on the GTPCP4. 

 

Here is the RM15TR-C(31). It has M19 X 1 internal threads:


Re: 1200GTO servicing project notes

M Hambrick
 

I expect that both the Ryobi and Harbor Freight extractors both come from China, but there are degrees of badness. Since they are a well known brand, I expect that the Ryobi extractors are held to a higher standard than the ones from Harbor Freight.

As a policy I don't trust anything from China, but especially anything that requires reliable metallurgy like drills, taps, and screw extractors. All of these cutting tools have to ride knife edge between hardness and brittleness. American made cutting tools can still be had from companies like Morse, Union / Butterfield, Niagara, and Cleveland Twist Drill, but you are going to pay a lot more for them.

Mike


Re: 1200GTO servicing project notes

Dale Ghent
 

Ah, you left out the context in your reply so it was unknown what you were referring to.

The Ryobi bits worked well for me, so I can speak only for my experience. I used the #1 extractor to remove all 8 of the delrin plugs on the 1200GTO that I serviced. A few light taps with a hammer to first seat the bit and then turning with a tap wrench was all that was required. If you do not have a tap wrench then an adjustable wrench or vice grips can serve as an awkward stand-in. But if you have extractors, you should really have a tap wrench that fits them for them to work well.

This is not to say that Ryobi bits are the only ones that will work for this task, of course. In my case, they worked better than the other brand I had from Harbor Freight.

On Apr 22, 2021, at 12:28, fernandorivera3 via groups.io <fernandorivera3=yahoo.com@groups.io> wrote:

Dale it was a Ryobi item from Home Depot & the link was posted to the group maybe 10 days ago or so <yes it takes me a while to reply to messages due to heavy work schedule>. I believe the product was for removal of the delrin clutch plugs among other things, IIRC.

Fernando


Re: GTOCP4 Caps

Ken Sablinsky
 

Maybe I jumped the gun and ordered too quickly on Mouser yesterday.  They showed the larger cap was out of stock and also said obsolete.  They recommended a different cap, RM15TR-C(31) which seemed to have the same specs as far as I can tell.  Guess I'll find out!


Re: 1200GTO servicing project notes

fernandorivera3
 

Dale it was a Ryobi item from Home Depot & the link was posted to the group maybe 10 days ago or so <yes it takes me a while to reply to messages due to heavy work schedule>. I believe the product was for removal of the delrin clutch plugs among other things, IIRC.

Fernando


Best way to prevent dovetail saddle plate from sticking to the mount?

skester@...
 

I know I read this somewhere but can't find it now.  After only 3 weeks being attached the dovetail saddle plate had become very much stuck to the top of the Dec axis of my new 1100GTO.  What is the preferred method to prevent this from happening?  I assume some form of lubricant but not sure what would be best.

Thanks


Re: GTOCP4 Caps

ap@CaptivePhotons.com
 

Ah, perfect, when the mount is ready I will ask for one.

 

Mine will be kept inside when not in use, so plastic is likely to work fine.  But when in use it’s a heavy, heavy dew environment so covering unused ports is a goodness.

 

Thanks.

 

 

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of M Hambrick via groups.io
Sent: Thursday, April 22, 2021 11:59 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] GTOCP4 Caps

 

Hi Linwood

Actually, Astro-Physics offers a set of plastic covers for all of the connectors on the GTOCP4/5 and the mount motors. You will have to call them to order a set. The interest in the metal covers is because they are more durable, and they will stay put, but as a minimum you should get a set of the plastic ones. I think they run about $15.00.

Mike


Re: 1200GTO servicing project notes

M Hambrick
 

Fernando

Are you referring to the screw extractor ? Those are all very very tricky to use.

Mike


Re: GTOCP4 Caps

M Hambrick
 

Hi Linwood

Actually, Astro-Physics offers a set of plastic covers for all of the connectors on the GTOCP4/5 and the mount motors. You will have to call them to order a set. The interest in the metal covers is because they are more durable, and they will stay put, but as a minimum you should get a set of the plastic ones. I think they run about $15.00.

Mike


Re: APPM model how many points portable?

Jim Grubb
 

I have the 1100 with encoders and have found a very successful very quick workflow using ASTAP-SGP-APPM.  You can turn off blind solving and it will very quickly move to the next point if it fails.  This is useful as I have the same issue with my horizon map not being perfect.  When the scope is pointing at the trees or the house, it just fails and quickly moves onto the next point.  This only happens for me near the horizon.  ASTAP is by far the fastest solver I have used and usually solves in under a second so you can turn the "Max Solve Time" parameter way down and it will fail very quickly.  I currently have mine set at 10s and am sure I could lower it to 2 or 3 seconds with no issues at all.  You may need to do a blind solve when you first set up the scope before you begin the pointing run.  [Screenshot: APPM - Plate Solve Settings Page]

On to the topic of how many points.  If you are only going after one target in an evening, you can run a narrow line at the declination of the target you are going to be imaging.  I typically use two lines spaced close together.  Here is an example of an 88 point model which covers 7 degrees of declination.  I can run this model in 1/2 hour.  And this is overkill, way more points than needed.  [Screenshot: Pointmap 1 example]

If you pull back on the RA spacing and tighten up the dec so that it only runs a single line of points at the exact declination of your target, you could get this down to 27 points, which on my rig will run in about 10 minutes.  [Screenshot: Pointmap 2 example]

Good luck!
Jim

As you experiment with different spacing, you will start to get a feel for what works.


Re: AP1100 park position question

Don Anderson
 

Thanks Bryan

Don Anderson


On Thursday, April 22, 2021, 07:10:03 a.m. MDT, Worsel via groups.io <bryancashion@...> wrote:


List of Linak distributors worldwide

https://www.linak.com/organisation/subsidiaries-distributors/


Bryan


Re: bugs in my 1200!

Howard Hedlund
 

Hi Steve,
Dave asked me to write the response.  I have attached a simple drawing in a PDF that he provided.  The good news is that the 6 perimeter holes are NOT through-holes.  The only 2 holes of possible concern are highlighted in the drawing.  I'm guessing they were covered by your plate.  For cleaning the holes out, he suggested using a 1/4-20 tap.


Re: GTOCP4 Caps

Sébastien Doré
 

Hello Howard,

Here are links to the Hirose covers. 
I suppose the two small ones would also fit the CP5 (keypad and power), right ?

What model would you recommend for the RA and DEC threaded connectors as well as those one the Mach2's back panel ?

Sébastien


Re: AP1100 park position question

Roland Christen
 

Park4 and Park5 work also.

Rolando



-----Original Message-----
From: M Hambrick <mhambrick563@...>
To: main@ap-gto.groups.io
Sent: Thu, Apr 22, 2021 8:44 am
Subject: Re: [ap-gto] AP1100 park position question

Hi Shailesh

I am joining this conversation late, but I thought you would be interested to see a picture of Roland's 175 EDF at his Hawaii observatory on a 1600 GTO mount that is stored in the Park 1 position (counterweights horizontal with the scope facing north).

My family rented their house for a vacation a couple of years ago, and he was gracious enough to allow me to use his scope to do some imaging with the specific instructions that the scope and mount absolutely had to be in the Park 1 position in order to close the roof of the observatory.

Mike

--
Roland Christen
Astro-Physics


Re: AP1100 park position question

Jack Huerkamp
 

Bryan,

 

The location in Louisville, KY is where I purchased my Linak lifting columns from.  Very pleasant to deal with.

 

Yours truly,

 

Jack

 

Jack Huerkamp

Jack's Astro Accessories, LLC

38388 Pine Street

Pearl River, LA 70452-5192

985-445-5063

mallincamusa@...

www.mallincamusa.com

30.37N  89.76W

 

All of us get lost in the darkness.
Dreamers learn to steer by the stars.

………………………………….Neil Peart

 

 

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Worsel via groups.io
Sent: Thursday, April 22, 2021 8:10 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] AP1100 park position question

 

List of Linak distributors worldwide

https://www.linak.com/organisation/subsidiaries-distributors/


Bryan


Virus-free. www.avg.com


Re: GTOCP4 Caps

ap@CaptivePhotons.com
 

> I expect that Astro-Physics' master machinist could easily fabricate whatever caps we

> might ever want, and I would happily pay for them.

As someone waiting for a mount, I’d love if I could just add a package of “covers for every opening” covers to the order, even if they are resold at a markup, it would be very convenient.

 

Linwood

 


Re: 1200GTO servicing project notes

Dale Ghent
 

I'm sorry, what are you referring to?

On Apr 22, 2021, at 10:35, fernandorivera3 via groups.io <fernandorivera3=yahoo.com@groups.io> wrote:

This particular item has more negative reviews than positive- buyer beware!!

Fernando


Re: 1200GTO servicing project notes

fernandorivera3
 

This particular item has more negative reviews than positive- buyer beware!!

Fernando


Re: bugs in my 1200!

Howard Hedlund
 

Hi Steve,

I'm going to refer this to our mount assembly wizard at the shop.  Look for a response from Dave.

Howard


Re: Strange behavior with Mach 2 and MaximDL auto pier flip #ASCOM_V2_Driver #Mach2GTO #Guiding

Howard Hedlund
 

Hi Brad,
I can't help much on the Maxim side, but regarding the AP V2 driver, I'll mention two things:
  1. I'm sure you are aware, but just in case, the pier side is displayed on the driver's window just above the direction buttons.
  2. You can verify in the log files with a search for   :pS#    (tell the search to match case).  The response is coming directly from the GTOCP5, and will be what the driver reports to all other software.

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